Unlike Vixen, I've read Kaysing's "book" (which in reality is nothing more than a rambling illustrated pamphlet), and also have copies of Allen & Weaver's various publications on the topic, all of which are variations on a theme and merely assemble the various hoax claims in a slicker format.
They all follow the same format:
Bare assertions - claims that some element of the process happened or didn't happened, based on nothing but their own say so, much like Vixen's claims that that Armstrong's press conference response was scripted in advance. Falling in to that category is their own assumption of motive or interpretation of behaviour that is heavily slanted by their own prejudices and
a priori reasoning.
"If I ran the zoo" - this has been repeatedly demonstrated by VIxen throughout this thread. Because things weren't done in a way that the hoax proponent has decided it should have been done, then it wasn't done at all. Likewise evidence that doesn't meet some arbitrary standard on which they have decided can be dismissed by them. Evidence from lunar probes? Well they claim to be 100 pixel resolution, I want 150 or I will refuse to accept it. It doesn't like I think it should, it wasn't transmitted on the day I think it should, it wasn't publicised the way I think it should, and so on and so on.
Information deficit - quite often the hoax proponent will claim something as fact because they just aren't aware that they thing they claim doesn't exist does actually exist. In on e of Weaver's books he claims no special cameras were taken to the moon to photograph stars when they should have done. The fact is they did, a UV spectrum telescope that took many photographs impossible from Earth. Stars were photographed in lunar orbit and cislunar space using specific film and techniques. They either just aren't aware of that and are arguing from a position of ignorance, or they know full well that this is the case and just gloss over it to sell copy. One proponent (who claimed to work for China's space agency, but did no such thing) insisted that China had no photographs of the Apollo landing site showing evidence of them. They do. I found them.
Dishonesty - time and time again we see claims being made that have been refuted over and over that the proponent knows about, but pretends that they haven't. Allen took the coward's way out when confronted by people who know what they're talking about and recanted his claims at the British Interplanetary Society, only to go back to them when in front of his paying audience. My favourite example of this is his "just asking questions" shtick over this Gemini photo
where he claims that the large 'stick' attached to the capsule should have been burnt off in re-entry and that "no-one can explain it". The fact is that it was explained to him multiple times, he just conveniently ignores it when presenting his carnival act to paying gullible marks (ironically, I can't remember precisely what it is, but it certainly isn't a mystery that no-one can explain) You only have to look at the countless videos by the "Apollo Detectives" on youtube to see lies and distortion presented as facts that are easily explained with a small amount of effort and a brain that open to understanding..
It's not that these claims haven't been debunked, it's that gullible and stupid people desperate to be part of a special club that gives them an explanation as to why their lives have amounted to nothing (instead of looking at their own failiings) refuse to accept that they have been. They don't want them to be debunked.